780
FNCA52 TJSJ 110730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST MON MAY 11 2026
DISCUSSION
AN ELEVATED FIRE THREAT CONTINUES THROUGH THIS AFTERNOON,
PARTICULARLY ACROSS THE SOUTHERN COASTAL PLAINS OF PUERTO RICO,
AS A RESULT, THE FIRE DANGER STATEMENT REMAINS IN EFFECT.
RAINFALL HAS BEEN VERY LIMITED ALONG THE SOUTHERN SECTIONS, AND A
DRY AIR MASS OVER THE REGION HAS ALLOWED RELATIVE HUMIDITY TO
DROP TO CRITICAL FIRE WEATHER LEVELS. RAWS STATIONS HAVE RECORDED
RELATIVE HUMIDITY IN THE UPPER 40S TO LOW 50S, ALONG WITH
SUSTAINED WINDS OF 15 TO 20 MPH AND GUSTS UP TO 30 MPH.
ADDITIONALLY, KBDI VALUES REMAIN ELEVATED, ESPECIALLY IN CABO
ROJO. THESE CONDITIONS FAVOR THE RAPID SPREAD OF WILDFIRES ACROSS
THE SOUTHERN COASTAL PLAINS.
FIRE MANAGEMENT PARTNERS ARE URGED TO REMAIN VIGILANT, AS SIMILAR
CONDITIONS ARE EXPECTED TO PERSIST IN THE COMING DAYS. THE
ISSUANCE OF ADDITIONAL FIRE DANGER STATEMENTS (RFDSJU) CANNOT BE
RULED OUT.
PRZ014-112000-
SOUTHEAST COASTAL PLAINS-
330 AM AST MON MAY 11 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 50 60
TEMP (24H TREND) 90 (+2) 72 (-2) 89
RH % (24H TREND) 42 (-10) 91 (+6) 49
WIND 20FT/EARLY(MPH) E 17 E 13 E 14
WIND 20FT/LATE(MPH) E 17 E 11 SE 16
MIXING HGT(FT-AGL/MSL)5950 5410
TRANSPORT WND (MPH) E 18 E 16
VENT RATE (KT-FT) 95200 75740
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-112000-
SOUTHERN HILLS-
330 AM AST MON MAY 11 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 40
TEMP (24H TREND) 87 (+4) 68 (-3) 86
RH % (24H TREND) 55 (-9) 98 (+7) 61
WIND 20FT/EARLY(MPH) E 14 E 11 E 12
WIND 20FT/LATE(MPH) E 14 E 12 SE 12
MIXING HGT(FT-AGL/MSL)6640 5940
TRANSPORT WND (MPH) E 18 E 15
VENT RATE (KT-FT) 106240 77220
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-112000-
NORTH COASTAL PLAINS-
330 AM AST MON MAY 11 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 40 50 50
TEMP (24H TREND) 90 (+1) 72 (-2) 90
RH % (24H TREND) 55 (-5) 97 (+6) 57
WIND 20FT/EARLY(MPH) E 16 E 18 E 13
WIND 20FT/LATE(MPH) E 20 E 12 E 18
MIXING HGT(FT-AGL/MSL)5750 5490
TRANSPORT WND (MPH) E 18 E 14
VENT RATE (KT-FT) 92000 65880
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-112000-
NORTHERN HILLS-
330 AM AST MON MAY 11 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 40 30 70
TEMP (24H TREND) 89 (+2) 69 (-3) 89
RH % (24H TREND) 55 (-4) 96 (+3) 59
WIND 20FT/EARLY(MPH) E 14 E 14 E 12
WIND 20FT/LATE(MPH) E 17 E 8 E 14
MIXING HGT(FT-AGL/MSL)7120 6310
TRANSPORT WND (MPH) E 15 E 13
VENT RATE (KT-FT) 92560 69410
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-112000-
WEST COAST-
330 AM AST MON MAY 11 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 60 30 50
TEMP (24H TREND) 91 (+1) 72 (-1) 91
RH % (24H TREND) 53 (-7) 95 (+5) 58
WIND 20FT/EARLY(MPH) E 14 E 11 E 13
WIND 20FT/LATE(MPH) E 16 E 10 E 14
MIXING HGT(FT-AGL/MSL)5760 5240
TRANSPORT WND (MPH) E 12 SE 13
VENT RATE (KT-FT) 57600 57640
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-112000-
EASTERN INTERIOR-
330 AM AST MON MAY 11 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 40 60 60
TEMP (24H TREND) 88 (+3) 69 (-4) 87
RH % (24H TREND) 57 (-6) 99 (+5) 61
WIND 20FT/EARLY(MPH) E 14 E 13 E 13
WIND 20FT/LATE(MPH) E 14 E 14 SE 12
MIXING HGT(FT-AGL/MSL)6620 6360
TRANSPORT WND (MPH) E 18 SE 15
VENT RATE (KT-FT) 105920 82680
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-112000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST MON MAY 11 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 60 60
TEMP (24H TREND) 82 (+3) 68 (-3) 82
RH % (24H TREND) 66 (-6) 100 (+4) 70
WIND 20FT/EARLY(MPH) E 12 E 11 E 12
WIND 20FT/LATE(MPH) E 12 E 11 SE 11
MIXING HGT(FT-AGL/MSL)5410 4590
TRANSPORT WND (MPH) E 20 SE 16
VENT RATE (KT-FT) 91970 64260
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-112000-
CENTRAL MOUNTAIN RANGE-
330 AM AST MON MAY 11 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 70 10 60
TEMP (24H TREND) 88 (+6) 66 (-3) 87
RH % (24H TREND) 55 (-9) 97 (+4) 61
WIND 20FT/EARLY(MPH) E 11 E 9 E 10
WIND 20FT/LATE(MPH) E 11 E 5 SE 10
MIXING HGT(FT-AGL/MSL)7960 6880
TRANSPORT WND (MPH) E 13 SE 13
VENT RATE (KT-FT) 87560 75680
DISPERSION 5 5
DSI 6 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-112000-
CAYEY MOUNTAIN RANGE-
330 AM AST MON MAY 11 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 30 60 60
TEMP (24H TREND) 83 (+3) 68 (-2) 82
RH % (24H TREND) 64 (-6) 100 (+3) 69
WIND 20FT/EARLY(MPH) E 12 E 10 E 11
WIND 20FT/LATE(MPH) E 12 E 10 SE 11
MIXING HGT(FT-AGL/MSL)5910 5570
TRANSPORT WND (MPH) E 18 E 15
VENT RATE (KT-FT) 94560 72410
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-112000-
VIEQUES-
330 AM AST MON MAY 11 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 60 50
TEMP (24H TREND) 86 (0) 74 (-2) 87
RH % (24H TREND) 62 (-2) 93 (+4) 63
WIND 20FT/EARLY(MPH) E 18 E 17 E 17
WIND 20FT/LATE(MPH) E 17 E 17 E 13
MIXING HGT(FT-AGL/MSL)3770 3490
TRANSPORT WND (MPH) E 21 E 22
VENT RATE (KT-FT) 67860 66310
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-112000-
CULEBRA-
330 AM AST MON MAY 11 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 50 40
TEMP (24H TREND) 89 (+2) 75 (-3) 89
RH % (24H TREND) 60 (-4) 93 (+8) 61
WIND 20FT/EARLY(MPH) E 17 E 18 E 17
WIND 20FT/LATE(MPH) E 17 E 18 E 13
MIXING HGT(FT-AGL/MSL)3760 3480
TRANSPORT WND (MPH) E 22 E 20
VENT RATE (KT-FT) 71440 59160
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-112000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST MON MAY 11 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 20
TEMP (24H TREND) 92 (+3) 73 (-1) 91
RH % (24H TREND) 42 (-11) 87 (+5) 47
WIND 20FT/EARLY(MPH) E 20 E 17 E 18
WIND 20FT/LATE(MPH) SE 23 E 14 SE 19
MIXING HGT(FT-AGL/MSL)5990 5420
TRANSPORT WND (MPH) E 20 E 20
VENT RATE (KT-FT) 101830 92140
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-112000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST MON MAY 11 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 60 40
TEMP (24H TREND) 86 (+1) 75 (-3) 86
RH % (24H TREND) 64 (-1) 93 (+8) 64
WIND 20FT/EARLY(MPH) E 17 E 18 E 17
WIND 20FT/LATE(MPH) E 18 E 18 E 13
MIXING HGT(FT-AGL/MSL)3700 3500
TRANSPORT WND (MPH) E 21 E 17
VENT RATE (KT-FT) 66600 52500
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-112000-
ST CROIX-
330 AM AST MON MAY 11 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 60 50
TEMP (24H TREND) 87 (+1) 73 (-4) 87
RH % (24H TREND) 63 (-3) 94 (+7) 64
WIND 20FT/EARLY(MPH) E 17 E 16 E 14
WIND 20FT/LATE(MPH) E 17 E 16 E 13
MIXING HGT(FT-AGL/MSL)4850 4860
TRANSPORT WND (MPH) E 22 E 17
VENT RATE (KT-FT) 92150 72900
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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